how to dynamically compile a ashx file? - asp.net

Question

I have a ashx file in a asp.net web project. It has a code behind cs file. The cs file is compiled into project dll & deployed to production. I found no way to dynamically change the cs file without deploying the whole project dll.
I have been putting c# code into aspx (not .cs) file, after deployment, I can make change to a single aspx file, and deploy, IIS can dynamically compile & merge with its code behind c# code.
Can I do the similar thing with ashx file?
Here is a quote from MSDN. http://msdn.microsoft.com/en-us/library/ms366723(v=vs.100).aspx
ASP.NET supports the dynamic compilation of ASP.NET pages (.aspx files), ASP.NET Web services (.asmx files), ASP.NET HTTP handlers (.ashx files)
thanks, this can save me lots of time!

Answer 1

I figured it out.
add a Generic handler - Handler1.ashx in visual studio
delete the cs file which auto-created.
open ashx again,
remove CodeBehind="Handler1.ashx.cs"
add c# code below
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
public class Handler1 : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
context.Response.Write("Hello World2");
}
public bool IsReusable
{
get
{
return false;
}
}
}

Answer 2

<%# WebHandler Language="VB" Class="FileVB1" %>
Imports System
Imports System.Web
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration
Public Class FileVB1 : Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim Slno As Integer = GlobalVariables.Slno
Dim bytes As Byte()
Dim fileName As String, contentType As String
Dim constr As String = ConfigurationManager.ConnectionStrings("APMCUBIntranetConnectionString").ConnectionString
Using con As New SqlConnection(constr)
Using cmd As New SqlCommand()
cmd.CommandText = "SELECT Slno,FileName, Valid FROM Manuals WHERE Slno=#Id"
cmd.Parameters.AddWithValue("#Id", Slno)
cmd.Connection = con
con.Open()
Using sdr As SqlDataReader = cmd.ExecuteReader()
sdr.Read()
Bytes = DirectCast(sdr("Valid"), Byte())
contentType = "application/pdf"
fileName = sdr("FileName").ToString()
End Using
con.Close()
End Using
End Using
context.Response.Buffer = True
context.Response.Charset = ""
If context.Request.QueryString("download") = "1" Then
context.Response.AppendHeader("Content-Disposition", Convert.ToString("attachment; filename=") & fileName)
End If
context.Response.Cache.SetCacheability(HttpCacheability.NoCache)
context.Response.ContentType = "application/pdf"
context.Response.BinaryWrite(bytes)
context.Response.Flush()
context.Response.[End]()
End Sub
Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property
End Class
Please solve my problem i'm getting error at (Bytes = DirectCast(sdr("Valid"), Byte()))